Friction-clutch.



C. G. WESTLUND.

FRICTION CLUTCH.

APPLICATION FILED MAR. 6. 1914.

Patented Feb. 15, 1916.

2 SHEETS-SHEET 1.

Rveniov [avZ hsz lund. (By

flwney C. G. WESTLUND.

FRICTION CLUTCH.

APPLICATION FILED MAR. 6, I914.

Patented Feb. 15, 1916.

2 SHEETSSHEET 2- 92 mung Bvenio Caz] b? hfi d UNITED STATES OF ICE.

CARL G.

wns'rmmn, or woncns'rnn, m nssacnusnrrs, 155mm; 'ro cent a.

WESTLUND comm ts, or woncnsrnn, massecnusn'rrs. I

description, taken in connection with the accompanying drawings, is aspecification.

An object of my invention is to provide a -friction clutch 'of simpleand inexpensive construction; v

. A further object consists in the provision of a clutch which can bereadily applied to shafting in ordinary use, without tearing down,rearranging, or disturbing in; any way said shafting which it is desiredto apply the clutch.

Other and further objectswill be appar-f ent from thefollowingdescription and the claims annexed thereto.

Figure 1 is a perspective view of a clutch embodying my invention. Fig.2 is a perspective view of a flanged wheel forming part of the clutchand which is adapted to .be secured. to the shaft which is to be driventhrough the clutch. Fig. 3 is a. perspective viewof closure plate orring adapted to be secured to the wheel shown in Fig. 2. Fig. 4 is acentral longitudinal section of the clutch 'mechanism assembled .on ashaft. Fig. 5 isan interior view-of a'second closure plate which carriesa portion of the ,mechanism. Fig. 6 is a perspective ,view of a drivingwheel adapted to receive a driving pulley on its hub. Fig. 7 is aperspective "view of one section of a divided friction disk.

Like reference parts in the several figures. The shaft-1, on whichadapted to be connected with the source of -power, not shown, throughthe medium of.

the clutch, as hereinafter set forth. To this end, the shafthas securedthereto, by means of ajset screw 2, a wheel 3, which is made a rimportion 4, the halves being secured to gather on shaft 1 by interioroverlapping straps 5 attached to each rim portion .by'

or the mechanism to I characters :designate like the clutch mecha-. himis assembled, is the driven shaft,

"Specification of Letters Patent. Patented Feb, 15 1916.

Application filed March 6, 1914.. Serial No. 822,799.

screwsfifi. The abutting edges of the rim portionsare furthermoreprovided with holes to receive dowel pins '7, whereby the halves of thewheel are securely united. The. set screw 2 passes through an integralhub 8 of the Wheel; which is likewise of divided construction,corresponding to the wheel.

L9osely mounted on shaft 1, and positioned within the rim 4 of wheel 3,is a wheel 9, having an elongated hub 10, said I wheel and hub beingmade ha1ves.aS shown in Fig. 6, and the said halvesbeing securedtogether on shaft 1 by dowel pins 11, 11. A driving pulley, not shown,is

source of power to said wheel.

9 in order to impart rotation from the An annular plate 12, capable ofsliding" 5 than hub 10, to permit free rotationoff' the- Referring tothe accompanying drawings,"

latter, as shown in Fig. 4. The'periphery of adapted to be splined tothe hub 10 of wheel plate 12 is provided withfour equidistant in thee'dge-offlange 4: for a purpose to be radialears 13 which areslidable-within cor-' respondingly shaped and spacednotches 1 1.

hereinafter described. The member, 12' is likewise made in halves, asshown in"Fi'g.

line of division being at right angles to the The halves of member 12are secured together by interior overlapping straps 15, having screws 16entering each half. On

the opposite side of wheel- 3, a. substantially annular member 17,having a. hub-like Ian- '3, to facilitate mounting on 1thejshaft', the

gitudinal extension '18, iscarried within the rim 4' in thesamemanner'inwhich thememher 12 is carried.- To this end the periphery ofmember 17 is provided with four equidistant radial ears 19, which areslidable within notches 20 in-the-edge of the rim,

the said notches being longitudinally alinedwith the previouslydescribed notches 14 V in the other edge of the rim. Alined apertures13', 19' and 3' are provided in plate '12, member 17 and wheel 3respectively,

preferably adjacent the spaced ears 13 and 19 of said'plate 12 andmember 17. The aper'tures 13' are screw. threaded to receive the screwthreaded ends of screw bolts 21 passing through all of said alinedapertures,

and held by nuts 22 on their outer ends. The member 17 is made inhalves, which are joined by peripherally disposed straps 23, 23

and inner straps 24, 24, Fig. 5, each of said straps overlapping eachhalf and being secured thereto by screws. The line of division betweenthe halves is parallel to the line between the halves of plate 12.

The opposing faces of wheel 3 and annular member 12 are recessed. at 25and 26 respectively to receive the friction disks 27, preferably ofwood, and made in halves, as shown in Fig. 7. Said disks lie on eitherside of the driving wheel 9, and" when the clutch is not operative,permit the free rotation of the wheel 9 between them, owing to the factthat the plate 12 is maintained at the limit of its movement, to theleft in Fig 4, by springs 28, carried in holes extending inward fromeach notch 14, and pressing outwardly against the corresponding ears 13of said member 12. The actuation of the clutch, by the mechanism aboutto be described, moves plate 12 inward against the action of saidsprings, compressing the two disks 27 and the wheel 9 between theopposing faces of plate 12 and wheel 3, whereby the rotation of thewheel 9 is frictionally imparted to the shaft 1 through wheel 3 and itsinterlocked member 12. The shaft 1 has slidablv mounted thereon ashipper sleeve 29, provided with a groove 30 at its outer end for theattachment of a shipper lever, not shown, to effectlongitudinal'movement of the sleeve. At its other end the sleeve 29carries four equidistant, upwardly and inwardly inclined arms 31, whichliein radial planes coincident with each of the four bolts 21, and eachof which is rigidly attached by a pair of rivets to upstanding ears 32on said sleeve. The arms 31 are forked at their ends and have journaledtherein rollers 33 of hardened steel which are adapted for rollingcontact against the sides of elongated slots 34 in the ends of levers35. Each lever 35 is pivoted at 36, between ears 37 on the inner face ofthe member 17, and has a cam surface 38 formed thereon, which isdesigned for rolling contact against a contiguous disk 39 0f chilled ortempered steel in the. face of the wheel. 3, wherebyto force the member17 in the opposite direction to the movement of the sleeve 29 when thelatter is moved inwardly of the clutch.- This outward movement of themembenl'? causes the connected member 12 to move in the same directionagainst-the action of the springs 28, thereby causing frictionalengagement of the disks 27 with opposite sides of the wheel 9, and withthe opposing recessed faces of the wheel 3 and plate 12, whereby therota.-

tion of the wheel 9 is imparted to the shaft.

The reversemovement of the shipper sleeve moves the cam surfaces 38 awayfrom the disks 39, permitting springs 28 to move the plate 12 to theleft in Fig. 4, thereby disengaging the friction disks 27 from the wheel9. It is to be noted that the friction disks 2'7 and the shipper sleeve29 are made sectional in the same manner as the other elements of theclutch, wherebv the whole device may be assembled on any line ofshaft'ing without necessitating the tearing down of the same.

It will be noted that while each member of the clutch which surroundsthe shaft is of sectional construction, the structural strength of thewhole is not thereby impaired, owing to the fact that the members 3 and12, and the members 3 and 17, which are in interlocking engagement, aredivided res ectively in transverse planes. By reason 0 this arrangement,each line of division of one member is spanned by an integral sectionof-another member, the latter interlocking with the two sections of theformer.

It will be further noted thatthe construction by which the arms 31 areheld rigid with respect to sleeve 29, and moved longitudinally of theshaft, maintains in all positions of said arms an obtuse angle betweeneach of them and the levers 35, whereby buckling of the parts isprevented. The rolling contact of the rollers 33 with the sides of theslots 34 eliminates the possibility of the lost motion between theparts, which would result from wear if the members 31 were pivoted ateach end.

I claim,

1. In a friction clutch, the combination with a driven shaft, of adriving wheel loosely journaled thereon and capable of longitudinalmovement, a driven wheel fixed to said shaft and having a rimsurrounding said driving wheel, said driven wheel and its rin, beingdiametrically divided, annular inc osing members disposed on oppositesides of said driven wheel, each providing lugs in slidable interlockingengagement with the rim of said driven wheel, "said members beingdiametrically divided at an angle to the line of division of said drivenwheel and rim, annular divided friction devices interposed on each sideof said driving wheel, and means for moving one of said annularinclosing members toward said driving wheel to press said frictiondevices into en-- gagement with the opposing surfaces of the driving anddriven parts.

-2. In a friction clutch, the combination witlia driven shaft, of adivided'driving wheel loosely journaled thereon and capable oflongitudinal movement, a driven wheel fixed to said shaft, and providing'a rim, said driven wheel and rim bein diametrically divided to permitof assem lyon said shaft, friction devices disposed on opposite,

sides of said driving wheel, one of said devices being between saiddriving wheel and said driven wheel, an annular member disfrictiondevice, said annular member having slidable interlocking engagementwith" of the shaft, to press the friction devices into engagement withthe faces of said driving wheel.

CARL G. WESTLUND.

W'itnesses PENELOPE COMBERBAGH, NELLIE WHALEN.

